Add forks repos endpoint
Add forks repos endpoint

https://developer.github.com/v3/repos/forks/
philschatz/octokat.js,sanemat/octokat.js,gmaclennan/octokat.js,gmaclennan/octokat.js,philschatz/octokat.js,matthewbauer/octokat.js,philschatz/octokat.js,bitoiu/octokat.js,sanemat/octokat.js,bitoiu/octokat.js,matthewbauer/octokat.js